Core-box.



W. K. 'LEVERING.

CORE BOX.

APPLICATION FILED JAN. 29, 918.

V Patented Apr. 22, 1919.

2 SHEETS-SHEET1.

L3UL578,

W. K. LEVERING.

CORE BOX.

APPLICATION FILED mm 29, I918 Patented Apr. 22, 1919.

2 SHEETS-SHEET 2.

KIT 11 I WILSON K. LEVERING, 0F RUXTON, MARYLAND.

GORE-BOX.

Specification of Letters Patent.

Patented Apr. 22, 1919.

Application filed January 29, 1918. Serial No. 214,326.

To all whom it may concern:

Be it known that I, WVILsoN K. LEVERING, a citizen of the United States, residing at Ruxton, in the county of Baltimore and State of Maryland, have invented certain new and useful Improvements in Core- Boxes, of which the following is a specification. 7

This invention relates to'core boxes, and more specifically to boxes employed for making cores used in connection with the forming of eyes in sash weights.

With many forms of core boxes now in common use, it is necessary, in order to remove the core, to turn the box upside down and strike it a sharp blow. This not only results in loss of time, but frequently the green sand cores are broken. While the two-part box shown in my own prior Patent No, 1,028,367, dated June 4, 1912, obviates this difliculty to a large extent, the said box is open to some objection as regards rapid manipulation.

The present invention may be regarded as an improvement over my above mentioned patent, and has as its primary object to increase the rapidity with which cores can be produced. As in my former patent, my

. improved box consists of two separable sections, but in the present case, these sections are hinged together and arranged to open by gravity, thus greatly facilitating the work of removing the cores and restoring the box into condition to receive a new charge.

In order that my invention may be clearly understood, reference is had to the accompanying drawings, forming part of this specification, and in which,

Figure 1 is a plan view of my improved box;

Fig. 2 is an end elevation thereof;

Fig. 3 is a side elevation thereof;

, Fig. 4 is a transverse section substantially on the line i- -l ofFig. 3, parts being in elevation;

Fig. 5 is a longitudinal section substantially on the line 5-5 of Fig. 1, parts being in elevation;

Figs. 6 and 7 are elevations at right angles to each other, showing the sand core as it appears when removed from the mold;

Fig. 8 is a transverse section taken on the line 8-8 of Fig. 6, looking in the direction of the arrows; and,

Fig. 9 is a perspective view of the end of the sash weight showing the appearance of the eye produced by means of my improved core box.

Referring to the drawings in detail, it will be seen that I have shown a box having two mold cavities so that two cores can be formed at a single operation. Obviously, the same principles of construction can be applied to a box having but a single mold cavity, or to a box having a larger number, as desired.

My improved core box comprises a base 1, having a central raised portion 1 In this raised portion are set one or more vertically extending cylindrical plugs 2. Passing through and supported by these plugs is a pivot pin 3, disposed slightly above the base 1, and on this pin are pivotally mounted the two sections 4-43 of the core box. Each section is provided with apertured lugs 7, engaging the pin 3.

Each of the sections 4 and 5 has part of the pattern formed therein so that when closed together, as shown in the drawings, they form, in connection with the plugs 2, the complete pattern or mold cavity. This mold cavity is indicated at 8 in the drawings and as shown, is cylindrical, since this is the most usual form for sash weights.

It will be noted that the two sections a and 5, which have abutting faces 6, are supported at the bottom by the lugs 7, engaging the pin 3, and that when free to move the sections tend to separate and fall away by gravity, moving to the right and left, re spectively, around the pin 3 as a center. Such opening movement is preferably limited by engagement of the lower edges 15 of the sections with a part such as 1 of the base.

In order to hold the sections together in operative position, as shown in the drawings, I provide a latch member 9, pivoted at 10, and having a shoulder 9, adapted to engage a wear-plate 11, secured to the section 5'. In the embodiment shown in which two mold cavities are provided, the latch 9 is disposed midway between the two cavities and this makes a very desirable and convenient arrangement.

By reference to Figs. 4 and 5, it will be seen that the sections 4 and 5, when in operative position, closely embrace the plugs 2 and the upper ends of such plugs are so shaped as to form part of the pattern. In the present instance, each plug is provided lltl with a V-shaped depression or notch 12, ex tending in the direction of the axis of the pivot pin 3, and with transverse U-shaped notches 13, of less depth than the notches 12, extending in a direction at right angles to the axis. These intersecting notches give rise to four upstanding points 14 on each plug.

Formed in the opposite walls of each sec tion 4-5 at the center of each mold cavity, is an opening 15, and these openings 15 are arranged in alinement with each other and .in registry with the notches 13 in the plugs,

thus forming a passageway through each mold cavity at right angles to the axis of the core box section. Located in this passageway is the twopart figure-patterncarrying bar 16 -17, similar to that shown in my former patent. In the present invention these bars extend at right angles to the pivotal axis of the core box sections, so that the bars for each cavity may be inserted and removed without interfering with the bars in an adjacent cavity, or cavities. The upper member 16 of such bar carries on its upper surface a figure pattern 19, while the lower member 17 serves to support the member 16 in position. Both members are freely slidable through the openings 15, except that the member 16 is provided with a shoulder 18, serving to engage the edge of one opening 15 so as to properly position the figurepattern 19 in the center of the mold cavity, and the member 17 is slightly wedge-shaped so that it can be pushed up tight.

.In operation, the mold cavities are filled with green sand which is then suitably tamped or jolted. The lower member 17 of each bar is then removed, thus allowing the upper member 16 to drop down, so that it may be withdrawn endwise out of the mold cavity without obliterating the impression which the figure-pattern 19 has made in the sand. After withdrawing both pattern bars, the latch 9 is raised, whereupon the two sections 45 fall apart by gravity, thus leaving the cores supported entirely by the plugs 2, and the cores may then be lifted off without fear of injury. After removing the cores, the two sections of the box are swung together again and are, held by the latch and, after the figurepattern bars have been placed in position, the box is ready for re-filling.

In Figs. 6 and 7, the finished core is in dicated by A. It has a wedge-shaped portion a, corresponding to the notch 12 in the plug, and an opening 64, extending transversely through it, such opening corresponding to the notch 13. The impression made in the core by the figure-pattern 19 is indicated at a In Fig. 9, X designates a finished sash weight having a wedge-shaped eye as, formed'by the portion 0; of the core and a cross bar w, corresponding with the opening a in the core. The figure a: is formed 011 the end of the sash weight in a position corresponding with the figure-pattern 19 and with the impression a" in the core. It will be understood that the cores A, as shown in Figs. 6 and 7, are used in connec tion with some suitable form offiask during the casting operation.

From the above it will be seen that I have provided a simple and practical construction of core box, and it is thought that the many advantages thereof will be readily appreciated without further discussion.

What I claim is:

1. A core box comprising a base, a plug projecting upwardly therefrom, a pivot pin projecting horizontally from said plug, and a pair of pattern sections pivotally mounted on said pin and adapted to embrace said plug, said sections and plug together defining the mold cavity.

2. A core box comprising a base, a plug projecting upwardly therefrom, a pivot pin projecting horizontally from said plug, a pair of pattern sections pivotally mounted on said pin and cooperating with said plug to form the mold cavity, said sections having alined openings at right angles to the axis of the sections, and said plug having a notch registering with said openings, and a figure pattern carrying bar extending through said openings and lying in said notch.

3. A core box comprising a base and a plurality of plugs projecting therefrom, a pair of pattern sections pivotally supported on said plugs and cooperating therewith to form mold cavities, each plug having a notch at right angles to the axis of the sections and the pattern sections having openings in alinement with said notches, and figure-pattern-carrying bars adapted to extend through said notches and alined openings.

In testimony whereof I have affixed my signature.

WILSON K. LEVERING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0." 

